Hi Lee,
Mully said it already. With X2 you'll need the mouse for quite a few things that should work from the console (mostly channel strip things like EQ, VSTs). The rest like transport, faders, navigation, extra buttons, etc. still works fine.
With X2 being out for 2 months and NAMM show about 2 months away, I'd bet a lot of money that we'll see X2b within a month (plus a few days). That will shed some light on whether control surfaces are of importance to Cakewalk or not. Other options like MCU suffer from similar deficiencies (from the Sonar side, not the surface).
Definitely no problems with the VS-700 IO box, especially since they fixed that expansion mode with the Octa-Capture last month, but I can only speak of win7 64 bit. There are no win 8 drivers yet available. Some users here seem to have moved to Lynx IO, yet I'm happy with the Porsche that I got for the price of a Ford ... don't need a Ferrari to drive down the same roads. Maybe one day when too much money makes my wallet too heavy ...